اک‌اک

Also known as Hacac, acetyl 2-propanone, 2,4-pentanedione, 2,4-dioxopentane, acetoacetone, 2,4-pentadione, pentan-2,4-dione, CH3-CO-CH2-CO-CH3

Acetylacetone is an organic compound with the chemical formula . It is classified as a 1,3-diketone. It exists in equilibrium with a tautomer . The mixture is a colorless liquid. These tautomers interconvert so rapidly under most conditions that they are treated as a single compound in most applications. Acetylacetone is a building block for the synthesis of many coordination complexes as well as heterocyclic compounds.